ASP.NET 文件下载

下载页面： <a href="download.ashx?url=<%=Server.UrlEncode("说明.txt")%>">下载</a>------------------------------------------------------------------------------ download.ashx code: <%@ WebHandler Language="C#" Class="download" %>
using System;
using System.Web;
public class download : IHttpHandler {

public void ProcessRequest (HttpContext context) {
string url = HttpContext.Current.Server.UrlDecode(context.Request.QueryString["url"]);
downloadfile(url);
}

public bool IsReusable {
get {
return false;
}
}
public void downloadfile(string s_fileName)
{
HttpContext.Current.Response.ContentType = "application/ms-download";
string s_path = HttpContext.Current.Server.MapPath("~/") + s_fileName;
System.IO.FileInfo file = new System.IO.FileInfo(s_path);
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.AddHeader("Content-Type", "application/octet-stream");
HttpContext.Current.Response.Charset = "utf-8";
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(file.Name, System.Text.Encoding.UTF8));
HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());
HttpContext.Current.Response.WriteFile(file.FullName);
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.End();
}
} From:/article/9522110.html